Well, 'The Magic of the TARDIS' is a well-known crossover. It combines the magical world of Harry Potter with the adventures of the Doctor in really interesting ways. The characters' interactions and the plot twists make it a great read.
There are quite a few. One popular one is 'The Time-Traveling Witch' where Hermione gets transported to the Doctor Who universe and has amazing adventures.
Another great one could be those crossovers with the 'Lord of the Rings' universe. In these fanfictions, Harry Potter might find himself in Middle - earth, facing new challenges and making alliances with characters like Frodo or Gandalf. The contrast between the magic systems of both worlds makes for an interesting read.
A well-liked one is 'Time and Magic'. It weaves a tale where Harry and Hermione's presence brings a unique dynamic to the Doctor's travels, facing challenges and uncovering mysteries together.
One interesting 'Harry Potter is a doctor' fanfiction could be where he uses his magic in a new way to heal patients in the Muggle world. He might combine spells with modern medical knowledge. For example, he could use a spell to quickly diagnose an illness that normal Muggle doctors find difficult to detect.
One great Harry Potter crossover fanfiction is 'A Very Potter Musical' which combines the world of Harry Potter with a musical format. It has humorous takes on the characters and situations from the original series. Another one could be those crossovers with the 'Percy Jackson' series, where the magic of the two different mythologies interact in interesting ways. There are also some crossovers with 'Doctor Who' that take the TARDIS into the wizarding world and create unique adventures.
One of the top ones I'd recommend is 'Time Warp Convergence'. It combines elements of Doctor Who with another popular sci-fi universe in a really exciting way.
One popular 'Harry Potter' fanfiction is 'The Life and Times of Severus Snape'. It delves deep into Snape's backstory, exploring his childhood, his time at Hogwarts as a student, and his complex relationship with Lily Potter. Another great one is 'A Marauder's Plan'. It focuses on the Marauders' era, showing their pranks and the development of their friendships in a really engaging way. And 'Harry Potter and the Methods of Rationality' is also well - known. It presents a different take on the wizarding world, with a more scientific and rational approach to magic.
One popular 'Harry Potter' fanfiction is 'The Black Family Values'. It delves deep into the complex relationships within the Black family, exploring their history and how it intertwines with Harry's story. Another is 'The Life and Times of Severus Snape', which gives a more in - depth look at Snape's character, his motives, and his life outside of what we see in the original books. There's also 'A Marauder's Plan' which focuses on the adventures of the Marauders during their school days at Hogwarts.
Some popular 'Harry Potter' fanfictions include 'The Life and Times' which delves deep into James Potter's life at Hogwarts. It's really well - written and gives a great backstory to Harry's father.
Some popular Harry Potter fanfictions include those that explore different relationships among the characters in a non - romantic and family - friendly way. For example, fanfictions that focus on the friendship between Harry, Hermione and Ron during their school years at Hogwarts. They might expand on their adventures outside of what was shown in the original books, like their exploration of hidden corners of the castle or their encounters with minor magical creatures.